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Vishay General Semiconductor - Diodes Division 1.5SMC27AHM3/H
- Part No.:
- 1.5SMC27AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27AHM3/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,177
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Product details
Overview
1.5SMC27AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 23.1 V stand-off voltage (VWM), clamps to ≤37.5 V at 40 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive sensor interfaces and industrial DC power rails.
For engineers reviewing the 1.5SMC27AHM3/H datasheet, 1.5SMC27AHM3/H pinout, 1.5SMC27AHM3/H application, or 1.5SMC27AHM3/H equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, SMC (DO-214AB) package dimensions, clamping behavior under surge conditions, and direct alternatives for automotive-grade transient suppression.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to shunt transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), while the low incremental surge resistance enables fast response (<1.0 ns) and tight clamping performance.
Rated for -65 °C to +150 °C operating junction temperature and qualified to AEC-Q101, the 1.5SMC27AHM3/H supports automotive applications where reliability under thermal cycling and repetitive surge stress is critical. It meets UL 497B recognition and J-STD-020 MSL Level 1 handling requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 23.1 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤37.5 V at 40 A - clamping voltage during 1500 W 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling capability under standardized surge waveform |
| IFSM | 200 A - single half-sine surge rating (8.3 ms), supporting high-energy inductive switch-off events |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and surge endurance |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive use including temperature cycling, humidity bias, and surge lifetime testing |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with <1 µA leakage at VWM |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free PCB assembly without moisture-related popcorning risk |
| UL 497B recognized (QVGQ2) | Meets safety standards for telecom and industrial signal-line protectors |
Applications
| Automotive Sensor Interface Protection | Industrial DC Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp positive-going transients above VWM. Use Value: Limits voltage seen by transceiver IC to ≤37.5 V during 40 A surge, preventing latch-up or gate oxide damage. |
Use Scenario: Safeguarding 24 V DC input stages of PLC modules and motor drives against 1500 W lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary front-end TVS on main power rail, coordinated with upstream fuse and downstream TVS array. Use Value: Absorbs full 10/1000 µs surge energy without degradation, maintaining VWM = 23.1 V for normal operation. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Shielding Ethernet PHY interface power pins (e.g., MDI-X) from ESD and induced surges in PoE-powered devices. IC Role / Device Role / Timing Role: Unidirectional clamping device on VDD line, referenced to local ground plane. Use Value: Responds in <1 ns to clamp transients before they reach PHY IC, with VC margin below IC absolute max rating. |
Use Scenario: Overvoltage protection on AC/DC adapter secondary-side output (e.g., 24 V output) prior to DC-DC converter input. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing inrush and line-switching spikes on regulated output rail. Use Value: Maintains 23.1 V nominal operation while clamping 1500 W surges to 37.5 V, preserving downstream regulator integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27AHE3/A | Same VBR range (25.7–28.4 V), lower PPPM = 600 W, SMB (DO-214AA) package (smaller footprint, higher RθJA) | Lower surge energy handling; suitable only for sub-600 W threats (e.g., ESD, minor switching noise) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4. |
| 1.5KE27A | Through-hole TO-204AE (DO-41); identical VBR/VC specs but higher RθJA (100 °C/W) and no AEC-Q101 qualification | Not suitable for automated SMT lines or automotive under-hood thermal profiles | Choose only for legacy through-hole designs or non-automotive prototypes requiring identical electrical behavior. |
Compared with SMBJ27AHE3/A and 1.5KE27A, the 1.5SMC27AHM3/H uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and SMC package thermal performance (RθJL = 15 °C/W), making it optimal for production automotive and industrial SMT applications demanding high-reliability transient immunity.
Availability
1.5SMC27AHM3/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial power supply protection, and telecom infrastructure projects requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC27AHM3/H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in automotive, industrial, and telecom systems - prioritizing AEC-Q101 compliance, low clamping voltage, and robust surge endurance in compact SMC packaging.
FAQ
What is the clamping voltage of the 1.5SMC27AHM3/H at its rated peak pulse current?
The 1.5SMC27AHM3/H clamps to a maximum of 37.5 V at its rated peak pulse current of 40 A, measured using the standard 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and ensures protected circuits remain within safe voltage limits during surge events. The 1.5SMC27AHM3/H achieves this with low incremental resistance and stable avalanche characteristics.
Is the 1.5SMC27AHM3/H qualified for automotive applications?
Yes, the 1.5SMC27AHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay documentation. It has undergone temperature cycling, high-temperature reverse bias (HTRB), and surge lifetime testing per automotive reliability standards. The 1.5SMC27AHM3/H is explicitly intended for under-hood and ECU-level transient protection where junction temperatures reach up to +150 °C.
What does the "HM3" suffix indicate in 1.5SMC27AHM3/H?
The "HM3" suffix in 1.5SMC27AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates tape-and-reel packaging (850 units per 7-inch reel), and "M3" confirms halogen-free molding compound and matte tin plating. This distinguishes it from commercial-grade "M3" parts lacking automotive qualification.
How does the 1.5SMC27AHM3/H compare to bidirectional TVS diodes like 1.5SMC27CHM3/H?
The 1.5SMC27AHM3/H is unidirectional and protects against positive transients only, with polarity-sensitive mounting (cathode toward protected line). In contrast, 1.5SMC27CHM3/H is bidirectional and handles symmetrical surges on AC or differential lines. The 1.5SMC27AHM3/H offers tighter VBR tolerance and lower leakage than its bidirectional counterpart, making it preferred for DC rail protection where polarity is fixed.
What is the thermal resistance of the 1.5SMC27AHM3/H, and why does it matter?
The 1.5SMC27AHM3/H has a typical junction-to-leads thermal resistance (RθJL) of 15 °C/W, critical for dissipating surge energy without thermal runaway. Unlike RθJA, RθJL reflects heat transfer directly into PCB copper pads - enabling accurate thermal design in high-reliability layouts. This low value supports repeated surge events in automotive and industrial applications where the 1.5SMC27AHM3/H must sustain performance over time.
1.5SMC27AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC27AHM3/H FAQ
1.How can I place an order for 1.5SMC27AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27AHM3/H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5SMC27AHM3/H reliable?
The price and inventory of 1.5SMC27AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC27AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27AHM3/H?
1.5SMC27AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27AHM3/H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5SMC27AHM3/H?
For technical support, including 1.5SMC27AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC27AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27AHM3/H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5SMC27AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC27AHM3/H?
All 1.5SMC27AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27AHM3/H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5SMC27AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC27AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27AHM3/H Tags
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